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Semiconductors which are used in solar cells are very expensive and have low efficiency which cannot meet the requirements for which are manufactured. The aim of this work is to search for highly efficient solar cells and reduce the cost of manufacturing solar cells. The work is organized into six chapters. The first chapter gives an introduction whiles the second chapter is concerned with the definition of polymers. The third chapter deals with review of literature on history of solar cells. The fourth chapter is divided into two sections. One presents the previous studies in polymer solar cells and the second one presenting the mechanism of polymer cells and the way of comparing them. Methodology and materials used in carrying out this research are presented in the fifth chapter, whiles the sixth chapter deals with results in graphical format and in-depth discussion of results and closed it with conclusions. This work is intended for those interested and researchers in the field of solar cells.

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Dr. Omer Abdalla Omer Gassim- Ph.D in Philosophy of Physics (materials (Solar Cell)). Assistant Professor in Physics Department Faculty of Science and Arts- Al Baha University- AlMikhwah, K.S.A since Nov 2015 up to now. Head of Physics Department-University of Kassala,Sudan Feb 2015 - Nov 2015.published several scientific papers.

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